Jennings : A Botanical Survey of Presque Isle. 407 



Pofamogeton foliosus Rafinesque. 



Potamogeton foliosus niagarensis (Tuckermann) Morong. 



Potamogeton pectinatus Linnreus. 



Naias flexilis (Willdenow) Roemer & Schultes. 



Scheuchzeriace/E. 

 Triglochin palustris Li nn?eus . 



Alismace^. 



Alisina plantago-aquatica Linnaeus. 

 Sagiitaria latifolia Willdenow. 

 Sagittaria rigida Pursh. 

 Sagittaria graminea Michaux. 



Gustave Guttenberg, July 9, 1879. Carnegie Museum Herbarium. 



HYDROCHARITACEyE. 



Philotria canadensis (Michaux) Britton. 

 Vallisneria spiralis Linnaeus. 



Graminea. 



Andropogon furcatus Muhlenberg. 

 Sorghastrum nutans (Linnaeus) Nash. 

 Panicum virgatum Linnaeus. 

 Panicum scribnerianum Nash. 

 Cenchrus carolinianus Walter. 

 Zizania aquatic a Linnjeus. 

 Oryzopsis asperifolia Michaux. 



Gustave Guttenberg, "Big Bend," May 8, 1880. Carnegie Mu- 

 seum Herbarium. 



Mnhlenbergia mexicana (LinUceus) Trinius. 

 Sporobolus cryptandrus (Torrey) A. Gray. 



Gustave Guttenberg, "Misery Bay," Sept. 26, 1879. Carnegie 

 Museum Herbarium. • 



Agrostis hyemalis (Walter) Britton, Sterns & Poggenberg. 

 Calamagrostis canadensis (Michaux) Beauvois. 

 Ammophila arenaria (Linnaeus) Link. 

 Avefia sativa Linnaeus. 



Fugitive along shore of Presque Isle Bay. 

 Danthonia spicata (Linnaeus) Beauvois. 



Gustave Guttenberg, July 10, 1879. Carnegie Museum Herbarium. 



